Mack signwriting brushes are imported from Mack themselves in the US and are extremely popular within the signwriting community. Mack Signwriting brushes are available in mainly sable hair or synthetic hair. No animals are raised or trapped for the sole purpose of making a brush. Natural animal hair may be used in its pure state or mixed with other types of hair to accomplish a particular mixture for price, and or, performance. Natural hair will hold a tremendous amount of paint, because it has microscopic scales along the shaft of the hair. Quality and price of natural hair is determined by the grade of animal, and by supply and demand. Generally speaking, longer hair is harder to find and more expensive than the shorter lengths. Synthetics are man-made of either nylon or polyester. They may come tipped, tapered, flagged, abraded or even etched to increase the brushes' ability to carry colour. The man-made filaments may be dyed and baked to make them soft and more absorbent.